Important crash in command_interpreter() with part of Unicode-characters

  /* special case to handle one-character, non-alphanumeric commands; requested    * by many people so "'hi" or ";godnet test" is possible. Patch sent by Eric    * Green and Stefan Wasilewski. */   if (!isalpha(*argument)) {     arg[0] = argument[0];     arg[1] = '\0';     line = argument + 1;   } else     line = any_one_arg(argument, arg);

if (!isalpha(*argument)) {

// somewhere near the function. const char specialSingleChars = "*';"; if (strchr(specialSingleChars, *argument) != NULL) {

interpreter.c: In function ‘command_interpreter’: interpreter.c:488:35: warning: initialization of ‘char’ from ‘char *’ makes integer from pointer without a cast [-Wint-conversion]   488 |   const char specialSingleChars = "*';";       |                                   ^~~~~ interpreter.c:500:14: warning: passing argument 1 of ‘strchr’ makes pointer from integer without a cast [-Wint-conversion]   500 |   if (strchr(specialSingleChars, *argument) != NULL) {       |              ^~~~~~~~~~~~~~~~~~       |              |       |              char In file included from sysdep.h:74,                  from interpreter.c:12: /usr/include/string.h:226:14: note: expected ‘const char *’ but argument is of type ‘char’   226 | extern char *strchr (const char *__s, int __c)       |              ^~~~~~

const char *specialSingleChars = "*';";